CN114355573A - Optical imaging system - Google Patents
Optical imaging system Download PDFInfo
- Publication number
- CN114355573A CN114355573A CN202210037121.8A CN202210037121A CN114355573A CN 114355573 A CN114355573 A CN 114355573A CN 202210037121 A CN202210037121 A CN 202210037121A CN 114355573 A CN114355573 A CN 114355573A
- Authority
- CN
- China
- Prior art keywords
- lens
- imaging system
- optical imaging
- refractive index
- concave
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000012634 optical imaging Methods 0.000 title claims abstract description 95
- 230000003287 optical effect Effects 0.000 claims description 24
- 238000003384 imaging method Methods 0.000 description 29
- 239000000463 material Substances 0.000 description 12
- 230000004075 alteration Effects 0.000 description 6
- 239000011521 glass Substances 0.000 description 6
- 238000002834 transmittance Methods 0.000 description 6
- 230000014509 gene expression Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000010295 mobile communication Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
- G02B13/0015—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design
- G02B13/002—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface
- G02B13/0045—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface having five or more lenses
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/18—Optical objectives specially designed for the purposes specified below with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/0025—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for optical correction, e.g. distorsion, aberration
- G02B27/0037—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for optical correction, e.g. distorsion, aberration with diffracting elements
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B9/00—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or -
- G02B9/62—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or - having six components only
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lenses (AREA)
Abstract
The present invention provides an optical imaging system comprising: a first lens having a convex object-side surface; a second lens having a convex object-side surface; a third lens having a convex object-side surface; a fourth lens having a negative refractive power and a concave image-side surface; a fifth lens having a concave image-side surface; and a sixth lens having a convex object side surface, wherein the first lens to the sixth lens are sequentially disposed from the object side.
Description
This application claims priority and benefit from korean patent application No. 10-2017-.
Technical Field
The present application relates to an optical imaging system comprising six lenses.
Background
The compact camera module may be mounted in a mobile communication terminal. For example, the compact camera module may be mounted in a slim device such as a mobile phone or the like. Such miniature camera modules include an optical imaging system with a small number of lenses so that they can also be slim. For example, the optical imaging system of a small camera module may include four or fewer lenses.
However, such an optical imaging system may have a high F-number (F No.), so that the optical imaging system may be difficult to use in a compact camera module having high performance.
The above information is presented merely as background information to aid in understanding the present disclosure. No determination is made as to whether any of the above-described contents are applicable as prior art with respect to the present disclosure, and no assertion is made.
Disclosure of Invention
This summary is provided to introduce a selection of concepts in a simplified form that are further described below in the detailed description. This summary is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used as an aid in determining the scope of the claimed subject matter.
In one general aspect, an optical imaging system includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens, which are sequentially arranged from an object side. The third lens and the sixth lens have positive refractive power, and an F-number (F No.) of the optical imaging system is 1.7 or less.
The first lens may have a positive refractive power.
The second lens may have a negative refractive power.
The fourth lens may have a negative refractive power.
TTL/(IMG HT) may be less than 1.5, where TTL is a distance on an optical axis from an object side surface of the first lens element to an imaging plane of the optical imaging system, and IMG HT is half a diagonal length of the imaging plane.
In another general aspect, an optical imaging system includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens arranged in order from an object side. The object side surface and the image side surface of the fourth lens are concave. An image side surface of the sixth lens is concave, and an F-number (F No.) of the optical imaging system is 1.7 or less.
The object side surface of the first lens may be convex.
The object side surface of the second lens may be convex.
An object side surface of the third lens may be convex.
An image side surface of the fifth lens may be concave.
An object side surface of the sixth lens may be convex.
The full field angle (FOV) of the optical imaging system may be 75 ° or greater.
R2/R1 may be greater than 20, where R1 is the radius of curvature of the object side surface of the first lens and R2 is the radius of curvature of the image side surface of the first lens.
R8/R10 may be greater than 0 and less than 2.0, where R8 is a radius of curvature of an image side surface of the fourth lens and R10 is a radius of curvature of an image side surface of the fifth lens.
R11/R12 may be greater than 0 and less than 1.2, where R11 is a radius of curvature of an object side surface of the sixth lens and R12 is a radius of curvature of an image side surface of the sixth lens.
D45/D56 may be greater than 5.0 and less than 10, where D45 is a distance on the optical axis from the image side surface of the fourth lens to the object side surface of the fifth lens, and D56 is a distance on the optical axis from the image side surface of the fifth lens to the object side surface of the sixth lens.
In another general aspect, an optical imaging system includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens arranged in order from an object side toward an imaging plane of the optical imaging system. The first lens, the third lens, and the sixth lens each have a refractive index smaller than refractive indices of the second lens, the fourth lens, and the fifth lens, and an F-number (F No.) of the optical imaging system is 1.7 or less.
The first lens, the third lens, and the sixth lens may each have a refractive index of 1.56 or less, and the second lens, the fourth lens, and the fifth lens may each have a refractive index of 1.6 or more.
The first lens and the third lens may each have an abbe number greater than abbe numbers of the second lens, the fourth lens, the fifth lens, and the sixth lens.
The first lens and the third lens may each have an abbe number of 55 or more, and the second lens may have an abbe number of 22 or less.
Other features and aspects will be apparent from the following detailed description, the accompanying drawings, and the claims.
Drawings
Fig. 1 is a diagram illustrating a first example of an optical imaging system.
Fig. 2 shows a graph representing aberration characteristics of the optical imaging system shown in fig. 1.
Fig. 3 is a diagram illustrating a second example of the optical imaging system.
Fig. 4 shows a graph representing aberration characteristics of the optical imaging system shown in fig. 3.
Fig. 5 is a diagram illustrating a third example of the optical imaging system.
Fig. 6 shows a graph representing aberration characteristics of the optical imaging system shown in fig. 5.
Like reference numerals refer to like elements throughout the drawings and detailed description. The figures may not be drawn to scale and the relative sizes, proportions and depictions of the elements in the figures may be exaggerated for clarity, illustration and convenience.
Detailed Description
The following detailed description is provided to assist the reader in obtaining a thorough understanding of the methods, devices, and/or systems described herein. However, various changes, modifications, and equivalents of the methods, apparatus, and/or systems described herein will be apparent to those skilled in the art upon reading the disclosure of the present application. For example, the order of operations described herein is merely an example, which is not limited to the order set forth herein, but rather, variations may be made in addition to operations which must occur in a particular order, which will be apparent upon understanding the disclosure of the present application. Moreover, descriptions of features known in the art may be omitted for the sake of clarity and conciseness.
The features described herein may be embodied in different forms and should not be construed as limited to the examples described herein. Rather, the examples described herein have been provided merely to illustrate some of the many possible ways to implement the methods, devices, and/or systems described herein that will be apparent after understanding the disclosure of the present application.
In the drawings, the thickness, size, and shape of the lens are slightly exaggerated for convenience of explanation. Specifically, the shapes of the spherical surface or the aspherical surface shown in the drawings are shown by way of example. That is, the shapes of the spherical surface or the aspherical surface are not limited to those shown in the drawings.
It is noted that the term "may" as used herein with respect to an example or embodiment (e.g., with respect to what the example or embodiment may include or implement) means that there is at least one example or embodiment that includes or implements such a feature, and all examples and embodiments are not limited thereto.
Further, in the present application, the first lens refers to a lens closest to an object (or object), and the sixth lens refers to a lens closest to an imaging surface (or image sensor). Further, all of the radius of curvature and the thickness of the lens, the distance (TTL) from the object side surface of the first lens to the imaging plane, half the diagonal length of the imaging plane (IMG HT), and the focal length of the lens are expressed in millimeters (mm). Further, the thickness of the lenses, the interval between the lenses, and TTL are distances measured on the optical axis of the lenses. Further, in the description of the shape of the lens, the meaning that one surface of the lens is convex is that the optical axis portion of the corresponding surface is convex, and the meaning that one surface of the lens is concave is that the optical axis portion of the corresponding surface is concave. Therefore, although one surface of the lens is described as being convex, an edge portion of the one surface of the lens may be concave. Also, although it is described that one surface of the lens is concave, an edge portion of the one surface of the lens may be convex.
An aspect of the present disclosure may provide an optical imaging system capable of being used in a compact camera module having high performance.
The optical imaging system may include six lenses sequentially arranged from the object side toward the imaging plane. For example, the optical imaging system may include a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens, which are sequentially arranged. The first to sixth lenses may be disposed with a predetermined interval therebetween. For example, a predetermined space may be formed between the image side surface of the first lens and the object side surface of the second lens.
The first lens may have an optical power. For example, the first lens may have a positive refractive power.
One surface of the first lens may be convex. For example, the object side surface of the first lens may be convex. The first lens may have an aspherical surface. For example, both surfaces of the first lens may be aspherical. The first lens may be formed using a material having high light transmittance and excellent workability. For example, the first lens may be formed using plastic. However, the material of the first lens is not limited to plastic. For example, the first lens may be formed using glass.
The first lens may have a predetermined refractive index. For example, the refractive index of the first lens may be less than 1.6. The first lens may have a predetermined abbe number. For example, the abbe number of the first lens may be 50 or more.
The second lens may have an optical power. For example, the second lens may have a negative refractive power.
One surface of the second lens may be convex. For example, the object side surface of the second lens may be convex. The second lens may have an aspherical surface. For example, both surfaces of the second lens may be aspherical. The second lens may be formed using a material having high light transmittance and excellent workability. For example, the second lens may be formed using plastic. However, the material of the second lens is not limited to plastic. For example, the second lens may also be formed using glass.
The second lens may have a refractive index greater than that of the first lens. For example, the refractive index of the second lens may be 1.6 or more. The second lens may have a predetermined abbe number. For example, the abbe number of the second lens may be less than 24.
The third lens may have an optical power. For example, the third lens may have a positive refractive power.
One surface of the third lens may be convex. For example, the object side surface of the third lens may be convex. The third lens may have an aspherical surface. For example, both surfaces of the third lens may be aspherical. The third lens may be formed using a material having high light transmittance and excellent workability. For example, the third lens may be formed using plastic. However, the material of the third lens is not limited to plastic. For example, the third lens may be formed using glass.
The third lens may have a refractive index substantially similar to that of the first lens. For example, the refractive index of the third lens may be less than 1.6. The third lens may have an abbe number similar to that of the first lens. For example, the abbe number of the third lens may be 50 or more.
The fourth lens may have an optical power. For example, the fourth lens may have a negative refractive power.
One surface of the fourth lens may be concave. For example, the object side surface of the fourth lens may be concave. The fourth lens may have an aspherical surface. For example, both surfaces of the fourth lens may be aspherical. The fourth lens may be formed using a material having high light transmittance and excellent workability. For example, the fourth lens may be formed using plastic. However, the material of the fourth lens is not limited to plastic. For example, the fourth lens may be formed using glass.
The fourth lens may have a refractive index greater than that of the first lens. For example, the refractive index of the fourth lens may be 1.6 or more. The fourth lens may have an abbe number smaller than that of the first lens. For example, the abbe number of the fourth lens may be less than 30.
The fifth lens may have an optical power. For example, the fifth lens may have a negative refractive power.
One surface of the fifth lens may be concave. For example, the image side surface of the fifth lens may be concave. The fifth lens may have an aspherical surface. For example, both surfaces of the fifth lens may be aspherical. The fifth lens may have an inflection point. For example, one or more inflection points may be formed on the object side surface and/or the image side surface of the fifth lens.
The fifth lens may be formed using a material having high light transmittance and excellent workability. For example, the fifth lens may be formed using plastic. However, the material of the fifth lens is not limited to plastic. For example, the fifth lens may be formed using glass.
The fifth lens may have a refractive index greater than that of the first lens. For example, the refractive index of the fifth lens may be 1.6 or more. The fifth lens may have an abbe number smaller than that of the first lens. For example, the abbe number of the fifth lens may be 30 or less.
The sixth lens may have an optical power. For example, the sixth lens may have a positive refractive power.
One surface of the sixth lens may be concave. For example, the image side surface of the sixth lens may be concave. The sixth lens may have an inflection point. For example, one or more inflection points may be formed on both surfaces of the sixth lens. The sixth lens may have an aspherical surface. For example, both surfaces of the sixth lens may be aspherical.
The sixth lens may be formed using a material having high light transmittance and excellent workability. For example, the sixth lens may be formed using plastic. However, the material of the sixth lens is not limited to plastic. For example, the sixth lens may be formed using glass.
The sixth lens may have a refractive index substantially similar to the refractive index of the first lens. For example, the refractive index of the sixth lens may be less than 1.6. The sixth lens may have an abbe number greater than that of the fifth lens. For example, the abbe number of the sixth lens may be 50 or more.
Further, the F-number (F No.) of the optical imaging system may be 1.7 or less. The full field angle (FOV) of the optical imaging system may be 75 ° or greater.
As described above, the first to sixth lenses may have aspherical shapes. For example, at least one surface of all of the first to sixth lenses may be aspherical. Here, the aspherical surface of each lens may be represented by the following formula 1:
in formula 1, c is the inverse of the radius of curvature of a lens, k is a conic constant, r is the distance from a point on the aspherical surface of the lens to the optical axis in a direction perpendicular to the optical axis, a to H are aspherical coefficients, and Z (or SAG) is the distance between a point on the aspherical surface of the lens at a distance r from the optical axis and a tangent plane intersecting the vertex of the aspherical surface of the lens.
The optical imaging system may further comprise a diaphragm. The stop may be disposed between the second lens and the third lens.
The optical imaging system may further comprise a filter. The filter may intercept a part of the wavelengths of incident light incident through the first to sixth lenses. For example, the filter may block incident light of infrared wavelengths.
The optical imaging system may also include an image sensor. The image sensor may provide an imaging surface on which light refracted through the lens may be imaged. For example, the surface of the image sensor may form an imaging plane. The image sensor may be configured to achieve a high level of resolution.
The optical imaging system may satisfy the following conditional expressions 2 to 6:
TTL/(IMG HT)<1.5 (2)
20<R2/R1 (3)
0<R8/R10<2.0 (4)
0<R11/R12<1.2 (5)
5.0<D45/D56<10 (6)
in the above conditional expressions 2 to 6, TTL is a distance from the object side surface of the first lens to the imaging plane, IMG HT is half of the diagonal length of the imaging plane, R1 is a radius of curvature of the object side surface of the first lens, R2 is a radius of curvature of the image side surface of the first lens, R8 is a radius of curvature of the image side surface of the fourth lens, R10 is a radius of curvature of the image side surface of the fifth lens, R11 is a radius of curvature of the object side surface of the sixth lens, R12 is a radius of curvature of the image side surface of the sixth lens, D45 is a distance from the image side surface of the fourth lens to the object side surface of the fifth lens, and D56 is a distance from the image side surface of the fifth lens to the object side surface of the sixth lens.
Next, an optical imaging system according to several examples will be described.
A first example of an optical imaging system will be described with reference to fig. 1.
A first example of the optical imaging system 100 may include a plurality of lenses having optical power. For example, the optical imaging system 100 may include a first lens 110, a second lens 120, a third lens 130, a fourth lens 140, a fifth lens 150, and a sixth lens 160.
The first lens 110 may have a positive refractive power, and its object-side surface may be convex and its image-side surface may be concave. The second lens 120 may have a negative refractive power, and its object-side surface may be convex and its image-side surface may be concave. The third lens 130 may have a positive refractive power, and its object-side surface may be convex and its image-side surface may be concave. The fourth lens 140 may have a negative refractive power, and its object-side surface may be concave and its image-side surface may be concave. The fifth lens 150 may have a negative refractive power, and its object side surface may be concave and its image side surface may be concave. Further, inflection points may be formed on the object side surface and the image side surface of the fifth lens 150. The sixth lens 160 may have a positive refractive power, and its object-side surface may be convex and its image-side surface may be concave. In addition, inflection points may be formed on both surfaces of the sixth lens 160. For example, the object side surface of the sixth lens may be convex in the paraxial region and may be concave in a region surrounding the paraxial region, and the image side surface thereof may be concave in the paraxial region and may be convex in a region surrounding the paraxial region.
The first lens 110, the third lens 130, and the sixth lens 160 may have relatively low refractive indices. For example, the refractive index of the first lens 110, the refractive index of the third lens 130, and the refractive index of the sixth lens 160 may be 1.56 or less. The second lens 120, the fourth lens 140, and the fifth lens 150 may have a relatively high refractive index. For example, the refractive index of the second lens 120, the refractive index of the fourth lens 140, and the refractive index of the fifth lens 150 may be 1.6 or more. The second lens 120 may have the highest refractive index in the optical imaging system 100. For example, the refractive index of the second lens 120 may be 1.66 or more. The sixth lens 160 may have the lowest refractive index in the optical imaging system 100. For example, the refractive index of the sixth lens 160 may be 1.54 or less.
The first lens 110 and the third lens 130 may have the largest abbe number in the optical imaging system 100. For example, the abbe numbers of the first lens 110 and the third lens 130 may be 55 or more. The second lens 120 may have a minimum abbe number in the optical imaging system 100. For example, the abbe number of the second lens 120 may be 22 or less.
The optical imaging system 100 may include a diaphragm ST. For example, the stop ST may be disposed between the second lens 120 and the third lens 130. The stop ST set as described above can control the amount of light incident on the imaging surface 180.
The optical imaging system 100 may include a filter 170. For example, the filter 170 may be disposed between the sixth lens 160 and the imaging surface 180. The filter 170 disposed as described above may intercept infrared light incident to the imaging surface 180.
The optical imaging system 100 may include an image sensor. The image sensor may provide an imaging plane 180, and the light refracted through the lens is imaged on the imaging plane 180. The image sensor may convert an optical signal imaged on the imaging plane 180 into an electrical signal.
The optical imaging system 100 configured as described above may have a low F-number (F No.). For example, the F No. of the optical imaging system in the first example may be 1.680.
The optical imaging system in the first example may have aberration characteristics as shown in fig. 2. Table 1 shows characteristics of the lens of the optical imaging system in the first example, and table 2 shows aspherical characteristics of the optical imaging system of the first example.
TABLE 1
TABLE 2
| First example | S1 | S2 | S3 | S4 | S5 | S6 | S7 | S8 | S9 | S10 | S11 | S12 |
| Radius of curvature | 1.503 | 31.216 | 6.214 | 2.379 | 6.814 | 21.082 | -48.326 | 22.417 | -40.411 | 20.146 | 1.427 | 1.287 |
| k | -0.418 | 0.996 | 0.964 | -1.000 | -0.995 | 1.000 | 0.453 | -0.291 | 41.061 | -49.945 | -1.996 | -0.830 |
| A | -0.003 | 0.004 | -0.012 | 0.013 | -0.010 | -0.032 | -0.050 | 0.044 | 0.387 | 0.070 | -0.525 | -0.408 |
| B | 0.045 | -0.058 | -0.017 | -0.045 | -0.087 | 0.398 | -0.050 | -0.485 | -0.947 | -0.070 | 0.487 | 0.282 |
| C | -0.090 | 0.095 | 0.033 | 0.062 | -0.120 | -3.023 | 0.022 | 0.834 | 1.100 | -0.078 | -0.347 | -0.167 |
| D | 0.093 | -0.065 | 0.050 | 0.062 | 0.293 | 10.280 | -0.038 | -0.761 | -0.85 | 0.125 | 0.17 | 0.07 |
| E | -0.057 | -0.042 | -0.032 | -0.031 | -0.271 | -21.285 | -0.050 | 0.289 | 0.379 | -0.083 | -0.053 | -0.019 |
| F | 0.008 | 0.094 | -0.050 | -0.062 | 0.051 | 26.147 | -0.036 | 0.042 | -0.073 | 0.031 | 0.010 | 0.003 |
| G | 0.009 | -0.066 | 0.042 | -0.062 | 0.033 | -17.499 | 0.050 | -0.060 | -0.001 | -0.006 | -0.001 | 0.000 |
| H | -0.006 | 0.017 | -0.005 | 0.145 | 0.105 | 4.957 | 0.001 | 0.012 | 0.001 | 0.001 | 0.000 | 0.000 |
A second example of the optical imaging system will be described with reference to fig. 3.
The optical imaging system 200 in the second example may include a plurality of lenses having optical power. For example, the optical imaging system 200 may include a first lens 210, a second lens 220, a third lens 230, a fourth lens 240, a fifth lens 250, and a sixth lens 260.
The first lens 210 may have a positive refractive power, and its object-side surface may be convex and its image-side surface may be concave. The second lens 220 may have a negative refractive power, and its object-side surface may be convex and its image-side surface may be concave. The third lens 230 may have a positive refractive power, and its object-side surface may be convex and its image-side surface may be convex. The fourth lens 240 may have a negative refractive power, and its object-side surface may be concave and its image-side surface may be concave. The fifth lens 250 may have a negative refractive power, and its object side surface may be convex and its image side surface may be concave. Further, inflection points may be formed on the object side surface and the image side surface of the fifth lens 250. The sixth lens 260 may have a positive refractive power, and its object-side surface may be convex and its image-side surface may be concave. In addition, inflection points may be formed on both surfaces of the sixth lens 260. For example, the object side surface of the sixth lens may be convex in the paraxial region and may be concave in a region surrounding the paraxial region, and the image side surface thereof may be concave in the paraxial region and may be convex in a region surrounding the paraxial region.
The first lens 210, the third lens 230, and the sixth lens 260 may have relatively low refractive indices. For example, the refractive index of the first lens 210, the refractive index of the third lens 230, and the refractive index of the sixth lens 260 may be 1.56 or less. The second lens 220, the fourth lens 240, and the fifth lens 250 may have relatively high refractive indices. For example, the refractive index of the second lens 220, the refractive index of the fourth lens 240, and the refractive index of the fifth lens 250 may be 1.6 or more. The second lens 220 may have the highest refractive index in the optical imaging system 200. For example, the refractive index of the second lens 220 may be 1.66 or more. The sixth lens 260 may have the lowest refractive index in the optical imaging system 200. For example, the refractive index of the sixth lens 260 may be 1.54 or less.
The first lens 210 and the third lens 230 may have the maximum abbe number in the optical imaging system 200. For example, the abbe numbers of the first lens 210 and the third lens 230 may be 55 or more. The second lens 220 may have a minimum abbe number in the optical imaging system 200. For example, the abbe number of the second lens 220 may be 22 or less.
The optical imaging system 200 may include a diaphragm ST. For example, the stop ST may be disposed between the second lens 220 and the third lens 230. The stop ST set as described above can control the amount of light incident on the imaging surface 280.
The optical imaging system 200 may include a filter 270. For example, the filter 270 may be disposed between the sixth lens 260 and the imaging surface 280. The filter 270 disposed as described above may intercept infrared light incident to the imaging plane 280.
The optical imaging system 200 may include an image sensor. The image sensor may provide an imaging plane 280, and the light refracted through the lens is imaged on the imaging plane 280. The image sensor may convert an optical signal imaged on the imaging plane 280 into an electrical signal.
The optical imaging system 200 constructed as described above may have a low F no. For example, the F No. of the optical imaging system according to the present exemplary embodiment may be 1.689.
The optical imaging system in the second example may have aberration characteristics as shown in fig. 4. Table 3 shows the characteristics of the lens of the optical imaging system in the second example, and table 4 shows the aspherical characteristics of the optical imaging system of the second example.
TABLE 3
TABLE 4
| Second example | S1 | S2 | S3 | S4 | S5 | S6 | S7 | S8 | S9 | S10 | S11 | S12 |
| Radius of curvature | 1.523 | 57.595 | 5.700 | 2.392 | 19.599 | -15.215 | -20.767 | 14.466 | 352.603 | 60.254 | 1.449 | 1.251 |
| k | -0.455 | 0.762 | 0.721 | -0.994 | -0.995 | 1.000 | 0.453 | -0.291 | 42.178 | -49.952 | -2.056 | -0.828 |
| A | -0.002 | -0.012 | -0.037 | -0.005 | -0.020 | -0.025 | -0.044 | 0.059 | 0.406 | 0.112 | -0.464 | -0.406 |
| B | 0.046 | -0.013 | 0.041 | -0.009 | -0.155 | 0.339 | 0.005 | -0.530 | -0.977 | -0.100 | 0.386 | 0.278 |
| C | -0.093 | 0.075 | 0.044 | 0.062 | 0.232 | -2.561 | -0.012 | 0.937 | 1.100 | -0.063 | -0.259 | -0.168 |
| D | 0.085 | -0.095 | -0.031 | 0.050 | -0.310 | 8.395 | -0.050 | -0.905 | -0.80 | 0.118 | 0.13 | 0.07 |
| E | -0.040 | -0.031 | -0.050 | -0.049 | 0.140 | -16.736 | -0.050 | 0.443 | 0.300 | -0.078 | -0.039 | -0.019 |
| F | -0.003 | 0.088 | 0.029 | -0.062 | 0.053 | 19.845 | 0.046 | -0.069 | -0.020 | 0.029 | 0.007 | 0.003 |
| G | 0.009 | -0.036 | 0.050 | -0.062 | 0.053 | -12.853 | -0.003 | -0.017 | -0.017 | -0.006 | -0.001 | 0.000 |
| H | -0.005 | 0.001 | -0.033 | 0.212 | 0.025 | 3.541 | -0.001 | 0.005 | 0.003 | 0.000 | 0.000 | 0.000 |
A third example of the optical imaging system will be described with reference to fig. 5.
The optical imaging system 300 according to the third example may include a plurality of lenses having optical power. For example, the optical imaging system 300 may include a first lens 310, a second lens 320, a third lens 330, a fourth lens 340, a fifth lens 350, and a sixth lens 360.
The first lens 310 may have a positive refractive power, and its object-side surface may be convex and its image-side surface may be concave. The second lens 320 may have a negative refractive power, and its object-side surface may be convex and its image-side surface may be concave. The third lens 330 may have a positive refractive power, and its object-side surface may be convex and its image-side surface may be concave. The fourth lens 340 may have a negative refractive power, and its object-side surface may be concave and its image-side surface may be concave. The fifth lens 350 may have a negative refractive power, and its object side surface may be concave and its image side surface may be concave. Further, inflection points may be formed on the object side surface and the image side surface of the fifth lens 350. The sixth lens 360 may have a positive refractive power, and its object-side surface may be convex and its image-side surface may be concave. In addition, inflection points may be formed on both surfaces of the sixth lens 360. For example, the object side surface of the sixth lens may be convex in the paraxial region and may be concave in a region surrounding the paraxial region, and the image side surface thereof may be concave in the paraxial region and may be convex in a region surrounding the paraxial region.
The first lens 310, the third lens 330, and the sixth lens 360 may have relatively low refractive indices. For example, the refractive index of the first lens 310, the refractive index of the third lens 330, and the refractive index of the sixth lens 360 may be 1.56 or less. The second lens 320, the fourth lens 340, and the fifth lens 350 may have relatively high refractive indexes. For example, the refractive index of the second lens 320, the refractive index of the fourth lens 340, and the refractive index of the fifth lens 350 may be 1.6 or more. The second lens 320 may have the highest refractive index in the optical imaging system 300. For example, the refractive index of the second lens 320 may be 1.66 or more. The sixth lens 360 may have the lowest refractive index in the optical imaging system 300. For example, the refractive index of the sixth lens 360 may be 1.54 or less.
The first lens 310 and the third lens 330 may have the largest abbe number in the optical imaging system 300. For example, the abbe numbers of the first lens 310 and the third lens 330 may be 55 or more. The second lens 320 may have a minimum abbe number in the optical imaging system 300. For example, the abbe number of the second lens 320 may be 22 or less.
The optical imaging system 300 may include a diaphragm ST. For example, the stop ST may be disposed between the second lens 320 and the third lens 330. The stop ST set as described above can control the amount of light incident on the imaging surface 380.
The optical imaging system 300 may include a filter 370. For example, the filter 370 may be disposed between the sixth lens 360 and the imaging plane 380. The filter 370, which is disposed as described above, may intercept infrared light incident to the imaging plane 380.
The optical imaging system 300 may include an image sensor. The image sensor may provide an imaging plane 380 on which light refracted through the lens is imaged on the imaging plane 380. The image sensor may convert an optical signal imaged on the imaging plane 380 into an electrical signal.
The optical imaging system 300 constructed as described above may have a low F no. For example, the F No. of the optical imaging system according to the third example may be 1.683.
The optical imaging system according to the third example may have aberration characteristics as shown in fig. 6. Table 5 shows the characteristics of the lens of the optical imaging system in the third example, and table 6 shows the aspherical characteristics of the optical imaging system of the third example.
TABLE 5
TABLE 6
| Third example | S1 | S2 | S3 | S4 | S5 | S6 | S7 | S8 | S9 | S10 | S11 | S12 |
| Radius of curvature | 1.513 | 32.180 | 5.763 | 2.318 | 9.080 | 231.495 | -45.570 | 20.349 | -427.313 | 16.111 | 1.416 | 1.283 |
| k | -0.410 | 0.996 | 0.202 | -0.694 | -0.995 | 1.000 | 0.453 | -0.291 | 41.061 | -49.945 | -2.001 | -0.832 |
| A | -0.002 | 0.001 | -0.023 | 0.000 | -0.013 | -0.002 | -0.021 | 0.052 | 0.393 | 0.088 | -0.496 | -0.397 |
| B | 0.047 | -0.044 | 0.000 | -0.014 | -0.171 | 0.145 | -0.006 | -0.421 | -0.954 | -0.069 | 0.450 | 0.271 |
| C | -0.093 | 0.057 | 0.050 | 0.062 | 0.204 | -1.638 | 0.000 | 0.666 | 1.100 | -0.092 | -0.308 | -0.162 |
| D | 0.093 | 0.013 | 0.022 | 0.062 | -0.208 | 5.718 | -0.050 | -0.531 | -0.88 | 0.132 | 0.15 | 0.07 |
| E | -0.056 | -0.089 | -0.050 | -0.036 | 0.052 | -11.903 | 0.016 | 0.159 | 0.413 | -0.081 | -0.044 | -0.019 |
| F | 0.008 | 0.016 | -0.026 | -0.062 | 0.053 | 14.581 | -0.048 | 0.042 | -0.085 | 0.029 | 0.008 | 0.003 |
| G | 0.009 | 0.045 | 0.050 | -0.062 | 0.053 | -9.667 | 0.046 | -0.037 | 0.000 | -0.006 | -0.001 | 0.000 |
| H | -0.007 | -0.021 | -0.013 | 0.185 | 0.031 | 2.707 | -0.011 | 0.006 | 0.002 | 0.000 | 0.000 | 0.000 |
Table 7 represents values of conditional expressions of the optical imaging systems according to the first to third examples. As seen from table 7, the optical imaging systems according to the first to third examples can satisfy all the numerical ranges of conditional expressions 2 to 6 set forth above.
TABLE 7
As set forth above, in the examples disclosed herein, an optical imaging system suitable for a compact camera module having high performance can be realized.
While this disclosure includes specific examples, it will be apparent after understanding the disclosure of the present application that various changes in form and detail may be made therein without departing from the spirit and scope of the claims and their equivalents. The examples described herein are to be considered in a descriptive sense only and not for purposes of limitation. The description of features or aspects in each example will be considered applicable to similar features or aspects in other examples. Suitable results may be achieved if the described techniques are performed in a different order and/or if components in the described systems, architectures, devices, or circuits are combined in a different manner and/or replaced or added by other components or their equivalents. Therefore, the scope of the present disclosure is defined not by the detailed description but by the claims and their equivalents, and all modifications within the scope of the claims and their equivalents are to be understood as being included in the present disclosure.
Claims (14)
1. An optical imaging system comprising:
a first lens having a convex object-side surface;
a second lens having a convex object-side surface;
a third lens having a convex object-side surface;
a fourth lens having a negative refractive power and a concave image-side surface;
a fifth lens having a concave image-side surface; and
a sixth lens having a convex object-side surface,
wherein the first lens to the sixth lens are arranged in order from an object side.
2. The optical imaging system of claim 1, wherein the second lens has a concave image-side surface.
3. The optical imaging system of claim 1, wherein the third lens has a concave image-side surface.
4. The optical imaging system of claim 1, wherein the first lens has a positive optical power.
5. The optical imaging system of claim 1, wherein the second lens has a negative optical power.
6. The optical imaging system of claim 1, wherein the sixth lens has a positive optical power.
7. The optical imaging system of claim 1, wherein the second lens has an abbe number of 22 or less.
8. The optical imaging system of claim 1, wherein the first lens and the third lens each have an abbe number of 55 or greater.
9. An optical imaging system comprising:
a first lens having a positive refractive power;
a second lens having a negative refractive power;
a third lens having a convex object side surface and a concave image side surface;
a fourth lens having a negative refractive power and a concave image-side surface;
a fifth lens having a concave image-side surface; and
a sixth lens having a positive refractive power,
wherein the first lens to the sixth lens are arranged in order from an object side.
10. The optical imaging system of claim 9, wherein the first lens has a convex object side surface.
11. The optical imaging system of claim 9, wherein the second lens has a convex object side surface.
12. The optical imaging system of claim 9, wherein the second lens has a concave image-side surface.
13. The optical imaging system of claim 9, wherein the sixth lens has a convex object side surface.
14. The optical imaging system of claim 9, wherein the first lens and the third lens each have an abbe number of 55 or more, and the second lens has an abbe number of 22 or less.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020170154877A KR102000009B1 (en) | 2017-11-20 | 2017-11-20 | Optical Imaging System |
| KR10-2017-0154877 | 2017-11-20 | ||
| CN201811381829.5A CN109814230B (en) | 2017-11-20 | 2018-11-20 | Optical imaging system |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811381829.5A Division CN109814230B (en) | 2017-11-20 | 2018-11-20 | Optical imaging system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114355573A true CN114355573A (en) | 2022-04-15 |
Family
ID=66532309
Family Applications (3)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821919160.6U Active CN209514187U (en) | 2017-11-20 | 2018-11-20 | Optical imaging system |
| CN201811381829.5A Active CN109814230B (en) | 2017-11-20 | 2018-11-20 | Optical imaging system |
| CN202210037121.8A Pending CN114355573A (en) | 2017-11-20 | 2018-11-20 | Optical imaging system |
Family Applications Before (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821919160.6U Active CN209514187U (en) | 2017-11-20 | 2018-11-20 | Optical imaging system |
| CN201811381829.5A Active CN109814230B (en) | 2017-11-20 | 2018-11-20 | Optical imaging system |
Country Status (3)
| Country | Link |
|---|---|
| US (2) | US11347028B2 (en) |
| KR (1) | KR102000009B1 (en) |
| CN (3) | CN209514187U (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102000009B1 (en) * | 2017-11-20 | 2019-07-15 | 삼성전기주식회사 | Optical Imaging System |
| CN111221110B (en) * | 2018-12-13 | 2022-01-07 | 浙江舜宇光学有限公司 | Optical imaging lens |
| KR102416100B1 (en) | 2019-10-15 | 2022-07-04 | 삼성전기주식회사 | Optical imaging system |
| CN111175942B (en) * | 2020-02-24 | 2021-09-24 | 诚瑞光学(常州)股份有限公司 | Image pickup optical lens |
| CN112859294A (en) * | 2021-02-22 | 2021-05-28 | 浙江舜宇光学有限公司 | Optical imaging lens |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9488808B1 (en) * | 2015-07-03 | 2016-11-08 | Largan Precision Co., Ltd. | Image capturing lens system, image capturing apparatus and electronic device |
| CN106597634A (en) * | 2015-10-20 | 2017-04-26 | 大立光电股份有限公司 | Image capturing lens system, image capturing device and electronic device |
| CN106940468A (en) * | 2015-11-20 | 2017-07-11 | Kolen株式会社 | Optical lens system |
| CN107765393A (en) * | 2016-08-22 | 2018-03-06 | 大立光电股份有限公司 | Image lens assembly, image capturing device and electronic device |
| CN109814230A (en) * | 2017-11-20 | 2019-05-28 | 三星电机株式会社 | Optical imaging system |
Family Cites Families (31)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000330014A (en) | 1999-05-25 | 2000-11-30 | Cosina Co Ltd | Large-aperture lens |
| TWI439720B (en) | 2011-03-11 | 2014-06-01 | Largan Precision Co Ltd | Image capturing lens assembly |
| TWI460465B (en) | 2012-04-20 | 2014-11-11 | Largan Precision Co Ltd | Optical image lens system |
| TWI472826B (en) | 2012-06-06 | 2015-02-11 | Largan Precision Co Ltd | Optical image lens system |
| TWI477803B (en) | 2013-03-05 | 2015-03-21 | Largan Precision Co Ltd | Photographing lens assembly |
| JP6233408B2 (en) | 2013-04-01 | 2017-11-22 | ソニー株式会社 | Imaging lens and imaging apparatus |
| TWI465762B (en) | 2013-08-09 | 2014-12-21 | Largan Precision Co Ltd | Image capturing lens assembly and image capturing device |
| CN104122652B (en) | 2014-03-06 | 2017-09-29 | 玉晶光电(厦门)有限公司 | The electronic installation of this camera lens of optical imaging lens and application |
| CN104238082B (en) | 2014-05-29 | 2016-12-07 | 玉晶光电(厦门)有限公司 | Optical imaging lens and apply the electronic installation of this optical imaging lens |
| EP3171211B1 (en) | 2014-07-15 | 2019-08-14 | Zhejiang Sunny Optics Co., Ltd. | Camera lens |
| TWI547713B (en) | 2014-07-30 | 2016-09-01 | 大立光電股份有限公司 | Imaging optical system, image capturing device, and electronic device |
| CN105334595B (en) | 2014-08-06 | 2017-12-01 | 玉晶光电(厦门)有限公司 | Portable electronic devices and its optical imaging lens |
| TWI519808B (en) | 2014-12-05 | 2016-02-01 | 大立光電股份有限公司 | Image capturing optical lens assembly, image capturing device and electronic device |
| KR101719880B1 (en) * | 2014-12-19 | 2017-03-24 | 삼성전기주식회사 | Lens module |
| TWI518364B (en) | 2014-12-29 | 2016-01-21 | 大立光電股份有限公司 | Optical imaging system, image capturing unit and electronic device |
| JP2016125613A (en) | 2015-01-07 | 2016-07-11 | 日立アプライアンス株式会社 | Flange and pump device including the same |
| TWI574037B (en) | 2015-01-30 | 2017-03-11 | 大立光電股份有限公司 | Optical image capturing system, image capturing device and electronic device |
| EP3255473A4 (en) | 2015-02-06 | 2018-09-26 | Sony Corporation | Imaging lens and imaging device |
| TWI598623B (en) | 2015-08-17 | 2017-09-11 | 先進光電科技股份有限公司 | Optical image capturing system |
| TWI565967B (en) | 2015-09-30 | 2017-01-11 | 大立光電股份有限公司 | Imaging optical system, image capturing apparatus and electronic device |
| TWI588526B (en) | 2016-01-22 | 2017-06-21 | 大立光電股份有限公司 | Optical imaging lens assembly, image capturing unit and electronic device |
| KR20180040262A (en) * | 2016-10-12 | 2018-04-20 | 삼성전기주식회사 | Optical Imaging System |
| TWI601995B (en) * | 2017-01-18 | 2017-10-11 | Largan Precision Co Ltd | Image capturing lens assembly, imaging apparatus and electronic device |
| TWI600940B (en) | 2017-03-01 | 2017-10-01 | 大立光電股份有限公司 | Optical imaging lens system, image capturing unit and electronic device |
| CN107121756B (en) | 2017-06-28 | 2022-09-06 | 浙江舜宇光学有限公司 | Optical imaging system |
| CN107272161B (en) | 2017-08-17 | 2022-09-23 | 浙江舜宇光学有限公司 | Optical imaging lens |
| WO2019037466A1 (en) * | 2017-08-23 | 2019-02-28 | 浙江舜宇光学有限公司 | Camera lens |
| WO2019080610A1 (en) * | 2017-10-25 | 2019-05-02 | 浙江舜宇光学有限公司 | Camera lens |
| KR102067455B1 (en) * | 2017-12-04 | 2020-01-20 | 삼성전기주식회사 | Optical Imaging System |
| CN115616745A (en) * | 2017-12-29 | 2023-01-17 | 玉晶光电(厦门)有限公司 | Optical imaging lens |
| TWI644142B (en) * | 2018-01-25 | 2018-12-11 | 大立光電股份有限公司 | Imaging optical lens assembly, imaging apparatus and electronic device |
-
2017
- 2017-11-20 KR KR1020170154877A patent/KR102000009B1/en active IP Right Grant
-
2018
- 2018-08-28 US US16/114,476 patent/US11347028B2/en active Active
- 2018-11-20 CN CN201821919160.6U patent/CN209514187U/en active Active
- 2018-11-20 CN CN201811381829.5A patent/CN109814230B/en active Active
- 2018-11-20 CN CN202210037121.8A patent/CN114355573A/en active Pending
-
2022
- 2022-04-26 US US17/729,184 patent/US12092899B2/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9488808B1 (en) * | 2015-07-03 | 2016-11-08 | Largan Precision Co., Ltd. | Image capturing lens system, image capturing apparatus and electronic device |
| CN106597634A (en) * | 2015-10-20 | 2017-04-26 | 大立光电股份有限公司 | Image capturing lens system, image capturing device and electronic device |
| CN106940468A (en) * | 2015-11-20 | 2017-07-11 | Kolen株式会社 | Optical lens system |
| CN107765393A (en) * | 2016-08-22 | 2018-03-06 | 大立光电股份有限公司 | Image lens assembly, image capturing device and electronic device |
| CN109814230A (en) * | 2017-11-20 | 2019-05-28 | 三星电机株式会社 | Optical imaging system |
| CN209514187U (en) * | 2017-11-20 | 2019-10-18 | 三星电机株式会社 | Optical imaging system |
Also Published As
| Publication number | Publication date |
|---|---|
| US12092899B2 (en) | 2024-09-17 |
| KR102000009B1 (en) | 2019-07-15 |
| US11347028B2 (en) | 2022-05-31 |
| CN109814230A (en) | 2019-05-28 |
| CN109814230B (en) | 2022-02-01 |
| CN209514187U (en) | 2019-10-18 |
| US20190154967A1 (en) | 2019-05-23 |
| US20220252830A1 (en) | 2022-08-11 |
| KR20190057664A (en) | 2019-05-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109725403B (en) | Optical imaging system | |
| CN108205187B (en) | Optical imaging system | |
| CN109725404B (en) | Optical imaging system | |
| CN108254855B (en) | Optical imaging system | |
| CN109814230B (en) | Optical imaging system | |
| CN107942475B (en) | Optical imaging system | |
| CN107367818B (en) | Optical imaging system | |
| CN210376836U (en) | Optical imaging system | |
| CN211653283U (en) | Optical imaging system | |
| CN116009210A (en) | Optical imaging system | |
| CN211206933U (en) | Optical imaging system | |
| CN114624861A (en) | Optical imaging system | |
| CN107015344B (en) | Conversion optical system | |
| CN109765675B (en) | Optical imaging system and multi-module optical imaging system | |
| CN110133821B (en) | Optical imaging system | |
| CN118311742A (en) | Optical imaging system | |
| CN213659079U (en) | Optical imaging system | |
| CN110554487B (en) | Optical imaging system | |
| CN109870784B (en) | Optical imaging system | |
| CN211577544U (en) | Optical imaging system | |
| CN221406157U (en) | Optical imaging system and electronic apparatus | |
| CN117572602A (en) | Optical imaging system and electronic apparatus |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |